Montelukast sodium granules are leukotriene receptor blockers, which can effectively play an anti-allergic role. How long you need to take them depends mainly on the clinical symptoms of the patient. If the patient’s allergic symptoms improve significantly after taking the drug, it is fine to take the drug for about three days. If the patient’s symptoms continue to be very serious, in such a case it is recommended to continue oral consolidation treatment and apply for about half a month without problems. If the patient still has not improved significantly after about half a month of medication, it is necessary to consider further consultation at the hospital to avoid delaying the patient’s condition. In ENT and dermatology often apply montelukast sodium granules, especially children use more, drink more water after the medication, if the child is particularly small, need to clarify the dosage used under the guidance of the doctor to avoid overdosing.